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Jim Broadbent
Lord Longford

Lindsay Duncan
Lady Elizabeth Longford

Samantha Morton
Myra Hindley

Andy Serkis
Ian Brady

Kate Miles
Rachel Pakenham

Alex Blake
Paddy Packenham

Sarah Crowden
Lady Tree

Robert Pugh
Harold Wilson

Anton Rodgers
Willie Whitelaw

Kika Markham
Governor Wing

Tam Dean Burn
Roy

Lee Boardman
Talk Show Host

Caroline Clegg
Longford's Secretary

Roy Barber
Father Kahle

Karen Spragg
Patricia Cairns

Karen Bayley
Holloway Prison Officer